Mothering Forum banner

1 - 10 of 10 Posts

·
Registered
Joined
·
1,922 Posts
Discussion Starter · #1 ·
We are staying at my MIL's and there's this man-made stagnant mosquito pond in the yard. We decided to put "mosquito dunks" in it to reduce our mosquito population. It isn't chemical, it is some kind of "biological" larvicide.<br><br><a href="http://www.marchbiological.com/L/mosquito_control.html" target="_blank">http://www.marchbiological.com/L/mosquito_control.html</a><br><br>
I threw 12 of them in, based on our estimate of the square footage of water. Well, ever since I threw them in about 15 days ago, we haven't heard the frogs sing at night. We used to have a lovely chorus of frogs every evening. I don't know if this is because of the time of year, or because the frogs eat mosquito larvae and they've all been killed off, or if the mosquito dunks killed the frogs directly. The dunks say they don't affect wildlife, but this seems like it could be more than coincidence.<br><br>
Does anyone have any knowledge about this? We're in northern Minnesota if that makes a difference.
 

·
Registered
Joined
·
3,802 Posts
From Wikipedia<br><div style="margin:20px;margin-top:5px;">
<div class="smallfont" style="margin-bottom:2px;">Quote:</div>
<table border="0" cellpadding="6" cellspacing="0" width="99%"><tr><td class="alt2" style="border:1px inset;"><i><b><a href="http://en.wikipedia.org/wiki/Bacillus_thuringiensis" target="_blank">Bacillus thuringiensis</a></b></i> <a href="http://en.wikipedia.org/wiki/Serovar" target="_blank">serovar</a> <b>israelensis</b> (<i><b>Bti</b></i>) is a group of bacteria used as <a href="http://en.wikipedia.org/wiki/Biological_control" target="_blank">biological control</a> agents for larvae stages of certain <a href="http://en.wikipedia.org/wiki/Diptera" target="_blank">Dipterans</a>. <i>Bti</i> produces toxins which are effective in killing various species of mosquitoes, fungus gnats, and blackflies, while having almost no effect on other organisms. Indeed this is one of the major advantages of <i><a href="http://en.wikipedia.org/wiki/B._thuringiensis" target="_blank">B. thuringiensis</a></i> products in general is that they are thought to affect few non-target species.</td>
</tr></table></div>
so it should not directly affect the frogs.<br>
Indirectly is another story. What were the frogs doing there? a good part of it was probbably feeding on mosquitoes laying eggs and newly hatched larva.<br>
With them gone the frogs may have moved too <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/shrug.gif" style="border:0px solid;" title="shrug"> (just guesses)
 

·
Registered
Joined
·
6,418 Posts
This shouldn't deter the adults from laying eggs there, and that is far too soon for the overall mosquito population to be impacted.<br><br>
I'm guessing coincidence. I used those for years in my pond and the fish and frogs were not affected.
 

·
Registered
Joined
·
1,922 Posts
Discussion Starter · #4 ·
Good to know, thank you.<br><br>
Maybe it was just "time" for the frogs to stop singing this year.
 

·
Registered
Joined
·
9,202 Posts
I've used them in my pond-- we have zillions of misquitos, but also zillions of bats... and we have zillions of frogs. In the middle of a sunny day, walk slowly and quietly towards the pond, and when you get close, make a little noise, and you'll hear them all jumping in the water to get away from you. Or, stay very very quiet and look around the edge and warm rocks.<br><br>
My frogs are not singing now, but in May, wow, they kept us awake. Guess they've all found their mates. But man, are some of those frogs huge!
 

·
Registered
Joined
·
1,922 Posts
Discussion Starter · #6 ·
That's good to know UUMom that your frogs were singing in May but have stopped. My mil couldn't say when they usually stop.<br><br>
I've never seen the frogs out here. The pond is surrounded by a lot of cattails so its hard to see into it at all.
 

·
Registered
Joined
·
9,202 Posts
<div style="margin:20px;margin-top:5px;">
<div class="smallfont" style="margin-bottom:2px;">Quote:</div>
<table border="0" cellpadding="6" cellspacing="0" width="99%"><tr><td class="alt2" style="border:1px inset;">
<div>Originally Posted by <strong>momileigh</strong> <a href="/community/forum/post/11627521"><img alt="View Post" class="inlineimg" src="/community/img/forum/go_quote.gif" style="border:0px solid;"></a></div>
<div style="font-style:italic;">That's good to know UUMom that your frogs were singing in May but have stopped. My mil couldn't say when they usually stop.<br><br>
I've never seen the frogs out here. The pond is surrounded by a lot of cattails so its hard to see into it at all.</div>
</td>
</tr></table></div>
Try appproaching the pond very quietly and see if you can hear them jump into the water. I wouldn't say they have completely stopped. We can still somtimes hear the bullfrogs croaking when we are near the pond. But they no longer peep so much that they wake us or keep us awake. They were having frat parties in there calling for mates in the spring, I swear. Quite a rowdy crowd, really.<br><br>
My dh mentioned that he hears them more when it's a bit damp and rainy-- they prefer to come out and play then. If it's been very dry where you are, that could be a reason they are so quite.<br><br>
Something could be killing your frogs, of course, They are very vulnerable. But it's probably not the dunks. I used about two in my pond, same as last years, but it's sounds smaller than yours.
 

·
Registered
Joined
·
1,922 Posts
Discussion Starter · #8 ·
I listened closely, but there are so many noises going on out there, I didn't hear any splashing. But I wouldn't say the frogs are totally silent here either, just that they aren't having their "frat parties" anymore as you put it! I do hear them individually now and then. Its just that it used to be a veritable racket, and now it isn't.
 

·
Registered
Joined
·
9,202 Posts
<div style="margin:20px;margin-top:5px;">
<div class="smallfont" style="margin-bottom:2px;">Quote:</div>
<table border="0" cellpadding="6" cellspacing="0" width="99%"><tr><td class="alt2" style="border:1px inset;">
<div>Originally Posted by <strong>momileigh</strong> <a href="/community/forum/post/11632941"><img alt="View Post" class="inlineimg" src="/community/img/forum/go_quote.gif" style="border:0px solid;"></a></div>
<div style="font-style:italic;">I listened closely, but there are so many noises going on out there, I didn't hear any splashing. But I wouldn't say the frogs are totally silent here either, just that they aren't having their "frat parties" anymore as you put it! I do hear them individually now and then. Its just that it used to be a veritable racket, and now it isn't.</div>
</td>
</tr></table></div>
<br>
I am not an environmental chemist, so I cannot tell you if your froggies are ok or not.<br><br>
I would contact your local university agricultural chemists. Bring them your soil & water-- it's ok if you are far away-- that's what they do.<br><br>
We in MDC can't research your water, kwim? But there are many near you who will. Let us know how it goes! I have you saved! <img alt="" class="inlineimg" src="/img/vbsmilies/smilies/treehugger.gif" style="border:0px solid;" title="Treehugger">:<img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/thumb.gif" style="border:0px solid;" title="thumbs up">
 

·
Registered
Joined
·
1 Posts
We are staying at my MIL's and there's this man-made stagnant mosquito pond in the yard. We decided to put "mosquito dunks" in it to reduce our mosquito population. It isn't chemical, it is some kind of "biological" larvicide.<br><br><a href="http://www.marchbiological.com/L/mosquito_control.html" target="_blank">http://www.marchbiological.com/L/mosquito_control.html</a><br><br>
I threw 12 of them in, based on our estimate of the square footage of water. Well, ever since I threw them in about 15 days ago, we haven't heard the frogs sing at night. We used to have a lovely chorus of frogs every evening. I don't know if this is because of the time of year, or because the frogs eat mosquito larvae and they've all been killed off, or if the mosquito dunks killed the frogs directly. The dunks say they don't affect wildlife, but this seems like it could be more than coincidence.<br><br>
Does anyone have any knowledge about this? We're in northern Minnesota if that makes a difference.
im sorry about that!! i have a pond also and thought dunks were safe but after i threw it in, i noticed the frogs were visibly dead. i could just cry that i killed these babies!! i had questions about why they died because the dunks say they are safe. i investigated, and everything else was the same except for the dunks. i noticed the mosquitoes around but my husband said its not due to our water in the pond cuz frogs eat mosquito larvae...lesson learned the hard way. just thought they need to change their recommendations on the package
 
1 - 10 of 10 Posts
Top